Plow bottom



P 1949- c. v. BECKSTROM 2,467,289

PLOW BOTTOM Filed Feb. e, 194s INVENTOR.

CARL V BECKSTROM M AJ'NQ' 35 25 I ghWzm I ATTORNEYS Patented Apr. 12, 1949 PLOW BOTTOM Carl V. Beckstrom, Moline, Ill., assignor to Deere & pompany, Moline, 111., a corporation of Illinois Application February 6, 1945, Serial No. 576,426

1 Claim. 1

The present invention relates generally to agricultural implements and more particularly to moldboard plows.

The object and general nature of the present invention is the provision of a new and improved plow having a quick detachable share which may readily be attached or removed. A particularly important feature of the present invention is the provision of new and improved interlocking means between the share and its supporting frog whereby the parts are strengthened, rather than weakened, by the interlocking means and whereby the interlocking means is so formed and disposed that improved wedging action, which assures that the share will be held firmly and rigidly in position, is secured.

These and other objects and advantages of the present invention to those skilled in the art after a consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which:

Figure 1 is a perspective view of the underside of a plow bottom embodying the principles of this invention.

Figures 2 and 3 are detached views showing the frog and share in separated relations.

Figure 4 is a view taken from the furrowward side, with parts broken away in order to show the interlocking means acting between the share and frog.

Figure 5 is a sectional view taken at an enlarged scale along the line 5-5 of Figure 4.

Referring to the drawings, the plow bottom I comprises generally a share 2, a moldboard 3, a landside 4, and a frog 5 which supports the other members in proper position relative to one another. The frog 5 comprises one or more plates which are bent or otherwise fabricated to provide a curved moldboard-receiving section and a substantially flat landside section 8, both extending downwardly and forwardly on a curve and terminating forwardly in a toe portion 9, with the landside and moldboard-receiving sections disposed at an acute angle with respect to one another. The moldboard 3 is secured, as by bolts H to the moldboard-receiving section I of the frog 5 and the landside 4 is also bolted to the frog, as at l2, receiving at its rear end a replaceable heel plate member [3.

The share 2 comprises a blade section ll of conventional elongated rectangular shape, one of the longitudinal edges |8 of which is sharpened to provide a cutting edge while the opposite longitudinally extending edge I!) is adapted to fit closely against a corresponding lower edge 2| of the moldboard 3, as in conventional tractors. The share 2 also includes a landside section 25 joined to the landward portion of the blade section I! in any suitable manner, as by forge welding or the like, and the landside and blade sections are connected or formed to lie at an acute angle one with respect to the other, corresponding to the acute angle of the landside and moldboard receiving portions of the frog, particularly at the toe portion 9 thereof. In Figure 1 the landside section of the frog at the forward or toe portion thereof is indicated by the reference numeral 26. A transverse bracket 28 is connected to the frog 5, forming a bracing part thereof, extending between the landside and moldboard-receiving sections thereof, and is apertured at 29 to receive the threaded end of a bolt 30, the opposite end of which is formed with an eye 32 in which a lug 33 carried by the share 2 is received.

An abutment strip 3| is permanently secured, as by welding or the like, to the lowermost edge 32 of the landside section 25 of the share 2 and is disposed with respect to the landside section 25 in such a position as to make an acute angle a (Figure 3) with respect to the plane of the landside section 25. It will be seen that the abutment strip 3| extends for a substantial length along the landside of the share 2 and in efiect, forms a reinforcing flange along the edge of the share landside section, materially strengthening the latter. The toe portion 26 of the frog 5 is formed with the landside section thereof having a beveled portion 35, the angle of which corresponds to the angle a between the abutment strip 3| and the landside section 25 of the share. This portion of the landside section of the frog is formed with a laterally inwardly offset front portion 36 extending to the forward end of the toe 26 and a rear portion or part 31 the lower edge of which extends below the beveled portion 35, the portion 31 receiving the plow landside 4, as best shown in Figure 1. This slight amount of laterally inward offset of the portion or part 36 accommodates the landside section 25 of the share which is slightl thicker than the front end of the plow bottom landside 4, as best shown in Figure 1. As best shown in Figure 4, the beveled edge 35 of the toe portion of the frog is offset generally upwardly a slight amount in order to receive the overlapping abutment section 3| when the share is mounted on the frog. Also, the bolt 30 is arranged so that when connected between the lug 33 and the brace 28 (see Figures 1 and 4) the line of pull extends not only fairly close to the front end of the toe portion of the frog but also at an acute angle with respect to the beveled edge 35 on the frog. As will be seen from Figure 4, in which the bolt itself is omitted for purposes of clarity, when the bolt is tightened the share blade is not only drawn down against the front portion of the moldboard-receiving section of the frog but the landside section 25 of the share is drawn rearwardly against the landside section 26 of the frog. Additionally, the upwardly and laterally inwardly angled abutment strip 3| is drawn snugly and firmly against the beveled edge 35 of the frog, thus interlocking the lowermost edge of the share landside section 25 with the toe portion of the frog for substantially a major portion of a length of these parts.

Thus I have secured a very effective interlock between the share and the frog, which interlock extends for a substantial distance along the lower edge of the share landside but does not require any slotting or weakening of the associated parts in order to effect the desired interconnection. This wide bearing between the share abutment 3| and the toe of the frog provides a very sturdy construction which effectively withstands all strains and shocks in service, such as, for example, those occurring when the plow bottoms are dropped to the ground to start plowing.

While I have shown and described above the preferred structure in which the principles of the present invention have been incorporated, it is to be understood that my invention is not to be limited to the particular details shown and described above, but that, in fact, widely difierent means may be employed in the practice of the broader aspects of my invention.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In a plow comprising a frog having a landside section with front and rear parts, the front parts being offset laterally inwardly with respect to said rear part, a landside fixed to said rear part, a share comprising blade and landside sections disposed in position to fit said frog with the landside section of the share thicker than said landside and disposed against the outer side of the laterally inwardly offset front part of said frog landside section, and an abutment strip fixed to the lower edge of the share landside section in a position thereon to engage over the lower edge of the front part of said frog landside section, the lower edge of said rear part extending below the lower edge of the laterally inwardly extending part a distance substantially equal to the thickness of said abutment strip, the lower edge of said laterally inwardly extending part being beveled and said abutment strip being disposed at an acute angle, corresponding to the bevel of said beveled edge, with respect to the plane of said share landside.

CARL V. BECKSTROM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,203,104 Esping Oct. 31, 1916 1,327,562 Kelly Jan. 6, 1920 1,327,921 Lee Jan. 13, 1920 1,439,222 Bohmker Dec. 19, 1922 2,347,167 Baker Apr. 25, 1944 FOREIGN PATENTS Number Country Date 28,848 Australia 1930 28,942 Australia 1930 

